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https://www.google.com/search?q=Earphone&hl=en&prmd=sinv&sxsrf=ALeKk03kvttoyCbDT9axCBWjwPRBkk3X3w:1584769885207&source=lnms&sa=X&ved=0ahUKEwjjurvw76roAhX3yDgGHSOuAl0Q_AUIBg

https://www.google.com/search?q=Earphone&hl=en&tbm=isch&sxsrf=ALeKk00LgvpQRSk8XUZ7N1q9D29aCQeBEQ:1584769338093&source=lnms&sa=X&ved=0ahUKEwiHgMnr7aroAhWJV30KHcXTCSgQ_AUIEygC

On my Earphone, there are two wires designated as R & L.

This means i have to connect the R earphone wire to my right ear & the L earphone wire to my left ear.

What will happen if i interchange the R designated wire to my Left ear & L designated wire to my Right ear?. i.e. interchange.

Thanks & Regards,
Prashant S Akerkar

Thanks.

https://m.youtube.com/watch?v=w46bWxS9IjY&list=RDw46bWxS9IjY&start_radio=1

As per my observations, when i interchange the wire connections, there was no difference.

Thanks & Regards,
Prashant S Akerkar

Thanks.

References

Google keyword

Earphone circuit diagram

https://www.google.com/search?tbm=isch&sxsrf=ALeKk01S7Ld5DjC39LnDTSove1gvn-RGfA%3A1584784699765&source=hp&ei=O-V1XrygLNHaz7sPqaaU8Ag&q=earphone+circuit+diagram&oq=Earphone+circ&gs_l=mobile-gws-wiz-img.1.0.0l5.1454.5478..6431...0.0..0.1782.6231.0j3j0j2j6-1j2j1......0....1.........35i39.hnvSTQWP9ic

Thanks & Regards,
Prashant S Akerkar

Thanks.

Did you find any difference after you interchange the wires listening the same song
twice?
I did not find any difference.

Thanks & Regards,
Prashant S Akerkar
 

No difference at all, changing the polarity won't change the sound.

Thank you.

So why there are two letters L & R respectively in the earphone wires?

Assumptions
-------------

L stands for Left ear connections

R stands for Right ear connections.

Thanks & Regards,
Prashant S Akerkar

They're labelled L and R because of their oreintation. The left earbud is built to fit into the left ear, the right is built to fit the right ear, that's all.

Thank you.

But after interchanging wires in the two ears, we could not find any difference in terms of sound /audio hearing from the same song?

Thanks & Regards,
Prashant S Akerkar

I think biolove is referring to the way earbuds are made only to fit one side of the ear correctly. In addition, some songs will increase the intensity of sound at one ear depending on the beat that's produced. That's another reason why they're labelled the way they are too

Thank you.

It could or maybe be in case of wireless earbuds because when i check with my wired earphones both the earbuds wires are fitted properly in both the ears even after interchanging.

Reference

Wireless Earphones.

https://www.google.com/search?q=wireless+earphones&source=lmns&hl=en&ved=2ahUKEwj9-O_m5a_oAhUafCsKHTuJBJ0Q_AUoAHoECAAQAw

Thanks & Regards,
Prashant S Akerkar

That's strange b/c usually they're specific for your specific ear shape.

Anyway, many songs take advantage of "panning" , this is when music goes from one ear to another. Changing the polarity might mess up with that. Only way to test is to hear music that uses the "panning" technique, and see if it changes the effect.

Thank you.

Its a lovely song & music from
Bee Gees Brothers.

https://m.youtube.com/watch?v=pMvHuxjFoNo&list=RDpMvHuxjFoNo&start_radio=1

What's your opinion?

Thanks & Regards,
Prashant S Akerkar

Great song...

Good example of panning:

https://www.youtube.com/watch?v=Uj_-od8gJUA

Try testing how this sounds with opposite polarities

Also, try this:

https://youtu.be/47dtFZ8CFo8